MalwareProfessional ServicesTechnologyProfessional ServicesRansomwareStolen CredentialsData ExfiltratedRansom DemandedFinancial accountIdentity (basic)Government IDHighContained

GERSON LEHRMAN GROUP, INC.

bd_a6d110a2d0e02830 · schema v1 · pii pii-v1

Severity

High

Discovered

Nov 12, 2023

Filed

Mar 12, 2024

To disclose

17 weeks

Affected

3,734state residents only

Linked

10 filings

Confidence

70%

Full breach record for GERSON LEHRMAN GROUP, INC. →2 incidents on file

Gerson Lehrman Group, Inc. reported a ransomware incident on November 12, 2023, affecting approximately 3,734 Washington residents. The attack involved unauthorized access via valid credentials and data encryption. GLG engaged forensic investigators, hardened systems, and provided credit monitoring services to affected individuals.

J jump to incidentP pin to compareR raw source

Washington clock✗ WA AG >90d17 weeks discovery → filing

⚠ occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Incident timeline

discovery → filing · 17 weeks / 121 days

Nov 12, 2023

Begins

Nov 12, 2023

Discovered

Mar 12, 2024

Filed

vs. sector median

1 wks faster

This filing is one of 10 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (9) · sorted by filing gap

Oregon State AGbd_30321db2548f181f2024-03-12Candidate
Maine State AGbd_40f515c14974b0852024-03-12Verified
South Carolina State AGbd_5ed22e7a141700a52024-03-12Verified
California State AGbd_690a00405f09498b2024-03-12Verified

Show 5 more filings ↓up to 1d gap

Montana State AGbd_6a5c413bc2a8a1102024-03-12Verified by operator
Indiana State AGbd_7401d65ed4c18ce72024-03-12Verified
Vermont State AGbd_8477b7863a3765852024-03-12Verified
New Hampshire State AGbd_956c9ae2eb034ab42024-03-12Verified
Massachusetts State AGbd_c965169beffea6d02024-03-13 · +1dVerified

Name: GERSON LEHRMAN GROUP, INC.
norm: gerson lehrman

Name: GERSON LEHRMAN GROUP, INC.
norm: gerson lehrman
Industry: Professional ServicesllmTechnologyllm

Discovered: Nov 12, 2023
Breach occurred: Nov 12, 2023 – Nov 13, 2023
Undetected for: 0 daysoccurrence → discovery
Materiality determined: —
Notification sent: —
Affected individuals: 3,734state-resident count only
Data types: Identity (basic)Government ID
Data elements: NameFinancial account numberDate of birthPassport number
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoing
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Initial access: valid_credentials

During the incident: Activated its incident response plan
Engaged a national cybersecurity firm to assist in assessing the scope of the incident
Retained additional cybersecurity experts to aid us in reviewing and revising our security protocols and to harden our systems
Took steps to mitigate the potential impact of the incident
Changes made: Arranged for complimentary credit monitoring services through CyEx Identity Defense Total
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 17 weeks(121 days from discovery to filing)
Compliance flags: WA AG >90d
Discovery-date grounding: occurrence dateThe stored discovery date equals the breach OCCURRENCE date. Detection is normally later, so this OVERSTATES the delay — a 'late' verdict here may not be real.

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 10 filings · 10 states

View merged incident ↗

Oregon State AGMar 12 · first

Maine State AGMar 12 · first

South Carolina State AGMar 12 · first

California State AGMar 12 · first

Montana State AGMar 12 · first

Indiana State AGMar 12 · first

Vermont State AGMar 12 · first

New Hampshire State AGMar 12 · first

Washington State AGMar 12 · first · this page

Massachusetts State AG+1d

Evidence ladder

Leak-site claim

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filingThis record

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

Source URL: https://agportal-s3bucket.s3.amazonaws.com/databreach/BreachA28210.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Mar 12, 2024
Raw hash: 42044b50d0bc91fe4e9e6418eb21a129f83b17159d60249a7ae67a72e370eae5

Linked disclosures

Regulatory filings (9) · sorted by filing gap

Reporting entityGERSON LEHRMAN GROUP, INC.

Victim entityGERSON LEHRMAN GROUP, INC.

Incidentdiscovered Nov 12, 2023

Stated responseActivated its incident response plan

ComplianceWA AG >90d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com